Shuttle tension device.



F. SCIELZO L R. DELEU.

SHUTTLE TENSION DEVICE.

APPLICATION msn MAR. 2s, 191s.

Patented oet. 22, 1918.

WITNESS:

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FERDINAND SCIELZO AND ROBERT DELEU, OF PATERSON, NEW JERSEY.

SHUTTLE TENSION DEVICE.

Application tiled March 2G, 1918.

f! b all whom t may concern:

Be it known that we, FERDINAND SGIELZO and ROBERT DELEU, citizens of the United States, residing at Paterson, in thecounty of Passaic and State of New Jersey, have in vented certain new and useful Improvements in Shuttle Tension Devices, of which the following is a specification.

This invention relates to tension devices for shuttles of the class in which there is a series of fixed thread guides and a fulcrumed device having loops forming other guides which are normally held in retracted relation to the fixed guides by a spring or equivalent elastic device acting upon the lever but are movable under the pull of the thread into alternating relation to said fixed guides. Usually, the fulcrumed device, which is made of wire, has its loops or eyelets formed by twisting the wire at spaced points upon itself to produce the loops, the incident crossing portions ofthe wire being in contact with each other and so producing notches or crevices in which the thread is likely to catch, thereby being frequently caused to break.

The object of our invention is to overcome this difficulty and at the same time provide a simple and inexpensive fulcrumed member for a thread tension means of the class indicated.

In the accompanying drawing, which fully illustrates our invention,

Figure l is a plan view of a shuttle embodying our improved tension device, a part of the shuttle being broken away to show the latter;

Fig. 2 shows the fulcrumed member removed and in side elevation; and

Fig. 3 is an end elevation of said member.

ln the shuttle a is arranged the usual eyelet b through which the thread c extends from the quill. (Z isthe cavity for the tension device which includes the usual row of fixed guides e with which the improved fulcrumed member having the movable guides coacts.

Said member is indicated in Fig. l by the character 7", being fulcrumed on the pin g. It is constructed as follows, reference being particularly had to Figs. 2 and 3.

A suitable length of wire is twisted near one end into a helix h whose coils bear side by side against each other, thus forming the bearing portion of said member, adapted to receive the pin g. Said end is rebent to form specification of Letters rat-ent.

Patented ct. 22, i918. serial No. 224,720.

the hooked attaching arm z' for the rubber or other elastic member y' (Fig. l)V attached to a rotatably adjustable screw. or pin 71; in the shuttle.

The part of the wire projecting from the bearing portion 7L and including the other end of the wire is bent into a succession of coils in the form of a helix Z whose axis is substantially at right angles to the axis and midway ofthe length of the coiled bearing portion These coils are so shaped that corresponding points of any two of them are sufliciently wide apart so that the coils will enter freely between the guides c. This description applies to all of the coils excepting two or more end ones m, whose pitch is much steeper than that of the other coils, so that they stand quite close together and may enter between two of the guides c.

The parts being assembled as shown in Fig. l, the tension device is threaded when the fulcrumed member is moved on its bearing pin g to a position where its coils are interposed between the guides e. Then when the fulcrumed member is released the thread assumes the zigzag relation shownin Fig. 1. In action, the elastic member j yields to the tendency of the thread to straighten, so that the fulcrumed member moves on its pivot more or less from the position shown in Fig. l to the for threading. Since the guide forming portion of the'fulcrumed member is a helix from end to end, no notches or crevices to catch the thread exist, wherefore the thread feeds through the fulcrumed member with perfect freedom at all times. The end coils m are of steeper pitch than the other coils so as to form in effect a guide and to insure proper delivery of the thread to the guiding means aorded by the outermost guide e and a guide a coacting therewith, it being noted that these two guides are laterally 01T- set with relation to the axis of the helix of the fulcrumed member. When the extreme end coil 'm becomes worn, it may be cut away, thus leaving another to serve in its place.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent is l. In a tension device of the class described, a fulcrumed tension member consisting of a length of wire having a portion thereof near one end bent into a succession of side-by-side coils and thus forming a bearing, having said end projecting from said position (already described) bearing and forming a terminal arm for the attachment thereto of an elastic device and havingl its other end portion projecting from the bearing and bent into an open helix whose axis is substantially at right angles to the axis and midway of the length of said bearing.

2. In a tension device of the class described, a fulcrumed tension member con sisting of a length of Wire having a portion thereof near one end bent into a succession of side-byside. coils and thus forming a bearing7 having said end projecting from Copies of' this patent may be obtained for said bearing and forming a terminal arm for the attachment thereto of an elastic device and having its yother end portion projecting from the bearing and bent into an open helix whose axis is substantially at right angles to the axis and midway of the length of said bearing, one or more convolutions of the helix at the extremity thereof having a relatively steep pitch.

In testimony whereof We aiiix our signatures.

FERDINAND SCIELZO. ROBERT DELEU.

five` cents each, by4 addressing the Commissioner of Patents,

Washington, D. C. 

